You are Here: Home >< Maths

# 48÷2(9+3) = ? watch

• View Poll Results: 48/2(9+3)
2
117
52.47%
288
106
47.53%

1. suuuuuuuuuuurely this is a troll?!?!

brackets first, as always -> 9+3 = 12, times 2 = 24
48 / 24 = 2.

yes.
2. (Original post by mangoh)
lol I can take it , it's a forum to discuss... of course listen to what the mod says but if you politely suggest why I am wrong then it should be fine.

BUT... I doubt u can as I am clearly right.
are you trolling? no offence.
i saw your answer, you did (9+3) = 12, + 2 = 14.
but it's 2(9+3) which is (9+3) = 12, times 2 = 24
48 / 24 = 2.

how has this caused so much debate?!
3. (Original post by CameraGirl)
are you trolling? no offence.
i saw your answer, you did (9+3) = 12, + 2 = 14.
but it's 2(9+3) which is (9+3) = 12, times 2 = 24
48 / 24 = 2.

how has this caused so much debate?!
BODMAS that you learn in school states you should divide before multiplying. Hence, according to that, what you did was wrong (divide 48 by 2, times by 12 = 288)
4. (Original post by CameraGirl)
are you trolling? no offence.
i saw your answer, you did (9+3) = 12, + 2 = 14.
but it's 2(9+3) which is (9+3) = 12, times 2 = 24
48 / 24 = 2.

how has this caused so much debate?!
first of all any need to double post :l, why not delete your post/edit it :l

and second, I know what I am talking about, I'm fairly good at maths.

I did the brackets first, you have to add 12 to 2 :l
5. (Original post by Hanvyj)
http://www.wolframalpha.com/input/?i=48%2F2*x+at+x%3D12

its 288!

No, seriously I don't know.

First thought was 2.

After reading (and realising division was before multiplication in BODMAS) i thought 288.

Now apparently these differ according to wolframalpha:

1/2*x and 1/2x - this makes sense to me, and now I am thinking 2 again... I think BODMAS was just some wierd thing they invented for school that just doesn't apply...
wolfram alpha is indeed godly, but can be dodgy if you don't use brackets right etc.

division may come first in BODMAS, but since the 2 is part of the brackets, you do that first. 2(9+3), the 2 is part of the bracketed bit, hence you would calculate that entire bit seperately to the 48. so yeah. it's 2.

(Original post by mangoh)
first of all any need to double post :l, why not delete your post/edit it :l

and second, I know what I am talking about, I'm fairly good at maths.

I did the brackets first, you have to add 12 to 2 :l
pleeeeeeeeeease tell me you are a massive troll? :P
any qualifications in maths?
lulz you're just so wrong it's funny.

ps. yeaaaaaah i have a bad habit of double posting. you'll get over it.
6. http://www.mathsisfun.com/operation-order-bodmas.html

The answer technically is 288 because when you cannot decipher clearly wether to divide or multiply first you work from left to right. (As shown in the link provided.)

so working from left to right,
48÷2(9+3)
(48/2)(9+3)
24*12= 288

By the way I initially thought 2 but it isn't as simple as it looks.
7. The fact the 'D' comes first in bodmas doesnt matter. the D and the M are of equal priority. The Bodmas rule can be misleading.
8. Bidmas/bodmas
9. (Original post by Hanvyj)
BODMAS that you learn in school states you should divide before multiplying. Hence, according to that, what you did was wrong (divide 48 by 2, times by 12 = 288)
see above. the 2 is part of the brackets, it's involved with the brackets not the 48.
if you wrote it out as a fraction you'd have:

48
--------
2(9+3)

i am doing maths with my degree. waaaaaay beyong bodmas and i think i'd be majorly stuffed if i couldnt even do that.

(Original post by connor ellis)
http://www.mathsisfun.com/operation-order-bodmas.html

The answer technically is 288 because when you cannot decipher clearly wether to divide or multiply first you work from left to right. (As shown in the link provided.)

so working from left to right,
48÷2(9+3)
(48/2)(9+3)
24*12= 288

By the way I initially thought 2 but it isn't as simple as it looks.
see above. if you rearrange it as a fraction it is just so easy, which is the proper way to do it, the division sign is jsut so kids can understand fractions differently.
10. Only on TSR would this thread still be going
11. It's 288, simple BODMAS.
12. (Original post by CameraGirl)
see above. the 2 is part of the brackets, it's involved with the brackets not the 48.
if you wrote it out as a fraction you'd have:

48
--------
2(9+3)

i am doing maths with my degree. waaaaaay beyong bodmas and i think i'd be majorly stuffed if i couldnt even do that.
a) Yes, mangoh is clearly trolling. Forget him.
b) Don't be so sure, without a fraction written vertically you can't be sure that the (9+3) shouldn't be on the top of the fraction, as would usually be the convention. Its basically ambiguous notation as we've all agreed, since there are two conflicting conventions at work. It can be either 2 or 288.
13. Oh jolly good, these questions always spur a wealth of intelligent and interesting arguments.

What is the best way to answer this question?
Spoiler:
Show
Rewrite it in an unambiguous syntax.

-Insert sarcasm quotes where applicable.
14. (Original post by CameraGirl)
see above. the 2 is part of the brackets, it's involved with the brackets not the 48.
if you wrote it out as a fraction you'd have:

48
--------
2(9+3)

i am doing maths with my degree. waaaaaay beyong bodmas and i think i'd be majorly stuffed if i couldnt even do that.

see above. if you rearrange it as a fraction it is just so easy, which is the proper way to do it, the division sign is jsut so kids can understand fractions differently.
I happen to agree, I was just pointing out where the debate came from. I did physics at uni and that is how I would have done it. I don't think I ever saw a division sign at Uni.
15. (Original post by Jallenbah)
Ok let me just make this very clear.

Multiplication and Division have EQUAL precedence
BIDMAS is an oversimplification of operator precedence taught to childeren. In reality, Multiplication and Division are equal, as are Addition and Subtraction.
What this means is that when you encounter a sum with them both, you do it left to right.
QFT!
16. guuuuuuuuys. i demonstrate:

had it been written 48/2x9+3 then there would have been no way of telling when to divide/multiply.
if it were (48/2)(9+3) then you would divide the 48 by 2 then multiply and get 288.
48/2(9+3), the 2 is clearly multiplying what's inside the bracket. that is just how maths works.
re-written as a fraction for clarity:

48
----
2(9+3)

= 2

(Original post by Hanvyj)
I happen to agree, I was just pointing out where the debate came from. I did physics at uni and that is how I would have done it. I don't think I ever saw a division sign at Uni.
aaaah ok haha. yeah i can't say i've seen a division sign since year 9 SATS if i'm honest!

i get how it could be misleading, but the 2 clearly goes with the brackets, else the whole problem would have to be re-written with differently placed brackets, around the 48. the 2 is only referring to that which is inside the brackets. reminds me of the chain rule of calculus haha.
17. (Original post by CameraGirl)

i am doing maths with my degree. waaaaaay beyong bodmas and i think i'd be majorly stuffed if i couldnt even do that.

yeah you would be stuffed lol, good job you got it right eh!
18. (Original post by CameraGirl)

see above. if you rearrange it as a fraction it is just so easy, which is the proper way to do it, the division sign is jsut so kids can understand fractions differently.
But you cannot take it as a fraction. you could if it was 48/(2(9+3)) then the answer would be 2. However as it is written 48/2(9+3) The 9+3 part is not necessarily on the lower half of the fraction. Using Bodmas properly the answer is 288 no doubt.
19. I actually can't believe this thread got so many replies. This is what all trolls aspire to cause.
20. I got OVER 9000!!!

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 9, 2011
Today on TSR

### Are exams rubbish?

Is the exam system out of date?

### University open days

• University of Chichester
Thu, 25 Oct '18
• Norwich University of the Arts
Fri, 26 Oct '18
• University of Lincoln
Sat, 27 Oct '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams